
statement: {a}>{b} ->
(> {a} {b})

statement: {a}={b} ->
(= {a} {b})

statement: {a}<{b} ->
(< {a} {b})

statement: -{a} ->
(- {a})

statement: 定义{a}的{函数}为{b} ->
(defun ({函数} {a}) {b})

statement: [当{a}时，则为{b}；]+ ->
(cond [({a} {b})]+ )

